Montero, who joined Seattle in their inaugural MLS season, is the club's all-time leading scorer with 47 goals in MLS play. Overall, he scored 60 goals with 43 assists across all competitions to lead the team.

A three-time MLS All-Star, Montero recorded 23 game-winning goals and 12 game-winning assists across all competitions in his four seasons with the Sounders and helped them win three straight US Open Cups from 2009-11.